Yang Zhongquan stared at the S-shaped test piece in his hand. He was in disbelief.
One shouldn't estimate this small S-shaped metal sheet. The surface of the metal object followed a spline function, which was generated by using a control point spline. This was very similar to the shape of aircraft wings.
Because of the twisted S-shape, the curved surface was at an acute angle with the base, therefore only a five-axis linkage machine tool could produce a shape like this. Also, the feed rate had to be changed several times during the machining process. This was a test of the performance of the machine.
Therefore, what reflected in the final S-shaped product wasn't only the machining accuracy, but also the force, heat, vibration, noise, and other error factors.
